Vortex Optics RAZOR HD 5-20X50 (MRAD) - EBR-2 5 MRAD TURRETS - Manual (Page 4)

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The Razor HD 5–20x50 riflescope uses a side focus parallax
adjustment which, when
properly set, eliminates
parallax errors. Properly
setting a side focus parallax
adjustment is a quick
procedure. When properly
set, the target image should
be sharp and crisp.
Parallax is a phenomenon that
results when the target image
does not quite fall on the same
optical plane as the reticle within
the scope. When the shooter’s eye
is not precisely centered in the
eyepiece, there can be apparent
movement of the target in relation
to the reticle, which can cause a
small shift in the point of aim.
Parallax error is most problematic
for precision shooters using high
magnifi cation.
Parallax Adjustment
Vortex Razor riflescopes use a fast focus eyepiece designed
to quickly and easily adjust the focus on the riflescope’s
reticle.
Reticle Focusing
Note: Once this adjustment is complete, it will not be necessary
to re-focus every time you use the rifl escope. However, because your
eyesight may change over time, you should re-check this adjustment
periodically.
1. Look through the riflescope at a blank white wall
or up at the sky.
2. Turn the eyepiece focus knob in or out until the reticle
image is as crisp as possible.
Try to make this
particular adjustment
quickly, as the eye will
try to compensate for an
out-of-focus reticle.
To adjust the reticle focus:
1. First, be sure the reticle is
correctly focused (see Reticle
Focusing).
2. As accurately as possible,
match the yardage number
(distance you are shooting) on
side focus parallax adjustment
knob to the indicator arrow on
the scope body.
3. Check the setting for
accuracy by moving your head
back and forth while looking
through the scope. The setting
is correct if there is no apparent
movement between the reticle
and target. If there is apparent movement, adjust the focus knob
slightly until the movement is eliminated.
To set the parallax:
Adjust the reticle focus
Adjust the side parallax knob